package com.hbpa.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class CharacterEncodingFilter implements Filter {

private FilterConfig config; 
	
	public void destroy() {
		 this.config = null;
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) request;  
		HttpServletResponse res = (HttpServletResponse) response;
		 
		String encoding = this.config.getInitParameter("encoding");
		if(encoding == null)
		{
			encoding = "gbk2312";
		}
		
		req.setCharacterEncoding(encoding);
		res.setCharacterEncoding(encoding);
		chain.doFilter(req, res);
	}

	public void init(FilterConfig config) throws ServletException {
		this.config = config; 
	}


}
